Intelligent questions. True, only East Germans are mentioned. Not Czechs, Poles, Magyars etc... The issue was televized accordingly, for an audience of already narrow-minded sheople.
It's all about us finding all the facts.
I've heard it said that the Bulgarian-artificial Turkish border was watched both ways. In other words, invaders from the Turkish side were also not spared machinegun fire from Bulgarian border guards. Unfortunately, something no longer practiced.
Turks residing in Germany, who run fruit & vegetable shops, are known for using the summer holidays for commuting to Turkey and to Turkish occupied European soil to bring back fresh products to sell in Germany. They are often road menaces, by causing numerous traffic fatalities, through their inability to drive vehicles like human beings can